"Bathing in Rare Mud Hot Springs The Guanziling Hot Springs (關子嶺) are located in the foothills of the mountains of Taiwan, about 70 km northeast of Tainan City. These hot springs produce a fine, silty mud which is found in only three places in the world. It's said to be magnificent for the skin. Whether it is, I do not know, but it feels pretty amazing. The springs are quite inexpensive, and are in a beautiful area with lots of nearby walking and hiking paths. It is also very close to the burning water."